An exciting adventure for 9-12 year old readers from talented new writer, Penny Boxall; perfect for fans of Netflix's plucky ENOLA HOLMES, the humour of Hana Tooke's THE UNADOPTABLES, and the caper of Katherine Rundell's ROOFTOPPERS. LONDON, OCTOBER 1775 Lettice Breech is itching to go on another adventure. But her beloved Pa is sick, and their home is in danger. Letty needs money. She needs treasure. So, when a mysterious socialite appears in London, promising more treasure than she can imagine, Letty finds herself embroiled in a thrilling new mystery right in her home city. Baffling poems, puzzling clues in dictionaries, and curious notes from a mysterious group known only as The Alphabetters lead Letty on a whirlwind adventure through the streets of London. And then there is - nearly - a murder . . . Can Letty use her deductive skills to unravel the mystery of the word thieves?